Question

5,7 with detail plz plz plz plz plz​

Answer 1

Answer: 5

x + 1/x = 12

x2 + 1/x2 = ??

( x + 1/x )2 = (12)2

x2 + 1/x2 + 2 = 144

subtract 2 on both side

x2 + 1/x2 = 144-2

x2 + 1/x2 = 142